public class BytecodeHelper extends Object
A helper class for bytecode generation with AsmClassGenerator.
| Type | Name and description | 
|---|---|
| static boolean | box(org.objectweb.asm.MethodVisitor mv, ClassNode type)box top level operand | 
| static boolean | box(org.objectweb.asm.MethodVisitor mv, Class type)Generates the bytecode to autobox the current value on the stack | 
| static void | doCast(org.objectweb.asm.MethodVisitor mv, ClassNode type) | 
| static void | doCast(org.objectweb.asm.MethodVisitor mv, Class type) | 
| static void | doCastToPrimitive(org.objectweb.asm.MethodVisitor mv, ClassNode sourceType, ClassNode targetType)Given a wrapped number type (Byte, Integer, Short, ...), generates bytecode to convert it to a primitive number (int, long, double) using calls to wrapped. | 
| static void | doCastToWrappedType(org.objectweb.asm.MethodVisitor mv, ClassNode sourceType, ClassNode targetType)Given a primitive number type (byte, integer, short, ...), generates bytecode to convert it to a wrapped number (Integer, Long, Double) using calls to [WrappedType].valueOf | 
| static void | doReturn(org.objectweb.asm.MethodVisitor mv, ClassNode returnType) | 
| static String | formatNameForClassLoading(String name)load a message on the stack and remove it right away. | 
| static String | getClassInternalName(ClassNode t) | 
| static String | getClassInternalName(Class t) | 
| static String | getClassInternalName(String name)@return the ASM internal name of the type | 
| static String[] | getClassInternalNames(ClassNode[] names)@return an array of ASM internal names of the type | 
| static String | getClassLoadingTypeDescription(ClassNode c)array types are special: eg.: String[]: classname: [Ljava.lang.String; Object: classname: java.lang.Object int[] : classname: [I unlike getTypeDescription '.' is not replaced by '/'. | 
| static String | getGenericsBounds(ClassNode type) | 
| static String | getGenericsMethodSignature(MethodNode node) | 
| static String | getGenericsSignature(ClassNode node) | 
| static String | getMethodDescriptor(ClassNode returnType, Parameter[] parameters) | 
| static String | getMethodDescriptor(MethodNode methodNode)Returns a method descriptor for the given MethodNode. | 
| static String | getMethodDescriptor(Class returnType, Class[] paramTypes)@return the ASM method type descriptor | 
| static String | getTypeDescription(Class c) | 
| static String | getTypeDescription(ClassNode c)array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [I | 
| static int | hashCode(String str)Computes a hash code for a string. | 
| static boolean | isClassLiteralPossible(ClassNode classNode)Tells if a class node is candidate for class literal bytecode optimization. | 
| static boolean | isSameCompilationUnit(ClassNode a, ClassNode b)Returns true if the two classes share the same compilation unit. | 
| static void | load(org.objectweb.asm.MethodVisitor mv, ClassNode type, int idx) | 
| static void | negateBoolean(org.objectweb.asm.MethodVisitor mv)negate a boolean on stack. true->false, false->true | 
| static void | pushConstant(org.objectweb.asm.MethodVisitor mv, int value) | 
| static void | unbox(org.objectweb.asm.MethodVisitor mv, Class type)Generates the bytecode to unbox the current value on the stack | 
| static void | unbox(org.objectweb.asm.MethodVisitor mv, ClassNode type) | 
| static void | visitClassLiteral(org.objectweb.asm.MethodVisitor mv, ClassNode classNode)Visits a class literal. | 
box top level operand
Generates the bytecode to autobox the current value on the stack
Given a wrapped number type (Byte, Integer, Short, ...), generates bytecode to convert it to a primitive number (int, long, double) using calls to wrapped.[targetType]Value()
mv -  method visitorsourceType -  the wrapped number typetargetType -  the primitive target typeGiven a primitive number type (byte, integer, short, ...), generates bytecode to convert it to a wrapped number (Integer, Long, Double) using calls to [WrappedType].valueOf
mv -  method visitorsourceType -  the primitive number typetargetType -  the wrapped target typeload a message on the stack and remove it right away. Good for put a mark in the generated bytecode for debugging purpose.
array types are special: eg.: String[]: classname: [Ljava.lang.String; Object: classname: java.lang.Object int[] : classname: [I unlike getTypeDescription '.' is not replaced by '/'. it seems that makes problems for the class loading if '.' is replaced by '/'
Returns a method descriptor for the given MethodNode.
methodNode -  the method node for which to create the descriptor
array types are special: eg.: String[]: classname: [Ljava/lang/String; int[]: [I
Computes a hash code for a string. The purpose of this hashcode is to be constant independently of the JDK being used.
str -  the string for which to compute the hashcodeTells if a class node is candidate for class literal bytecode optimization. If so, bytecode may use LDC instructions instead of static constant Class fields to retrieve class literals.
classNode -  the classnode for which we want to know if bytecode optimization is possibleReturns true if the two classes share the same compilation unit.
a -  class ab -  class bnegate a boolean on stack. true->false, false->true
Generates the bytecode to unbox the current value on the stack
Visits a class literal. If the type of the classnode is a primitive type, the generated bytecode will be a GETSTATIC Integer.TYPE. If the classnode is not a primitive type, we will generate a LDC instruction.